Inspecting apparatus
United States Patent 2229638

Inventors:
Chamberlin, Alan C.
Nieman, Henry W.
Publication Date:
01/28/1941
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Assignee:
BETHLEHEM STEEL CORP
Primary Class:
83/106
Other Classes:
250/559.460, 83/112, 209/3.200, 83/89, 83/88, 83/102, 83/80
International Classes:
G01N21/89; G01N21/88